manufacturer Archives

Wafer type dual plate check valve: metal seated vs resilient seated

October 12, 2021

Wafer dual plate check valve is used for pure pipelines and industrial, environmental protection, water treatment, high-rise building water supply and drainage pipelines, to prevent the reverse flow of the medium. The check valve adopts a clamp type, the butterfly plate is two semicircles, and it adopts a spring for forced reset. The sealing surface can be built-up welding wear-resistant material or rubber lining, with a wide range of use and reliable sealing.

The check valve opening and closing parts are opened or closed automatically by the flow and force of the medium to prevent the medium from flowing back. The valve is called the check valve. Check valves belong to the category of automatic valves, which are mainly used in pipelines where the medium flows in one direction, and only allow the medium to flow in one direction to prevent accidents.

According to the structure of the check valve, it can be divided into three types: lift check valve, swing check valve and butterfly check valve. Lift check valves can be divided into two types: vertical and horizontal. Swing check valves are divided into three types: single valve, double valve and multi valve. The butterfly check valve is a straight-through type. The above-mentioned check valves can be divided into three types in connection form: threaded connection, flange connection and welding. A check valve is a valve that can automatically prevent fluid from flowing back. The disc of the check valve is opened under the action of fluid pressure, and the fluid flows from the inlet side to the outlet side. When the pressure on the inlet side is lower than that on the outlet side, the valve flap is

H46-double flanged dual plate check valve-metal seated

automatically closed under the action of the fluid pressure difference, its own

lug type dual plate check valve metal seated (3)

gravity and other factors to prevent the fluid from flowing back.

klug type dual plate check valve metal seated (1)The dual plate check valve is divided into flange dual plate check valve, lug dual plate check valve and wafer dual

plate check valve.

Classification of wafer dual plate check valves: hard-seal wafer dual plate check valve and soft-seal wafer dual plate check valve; of which soft-seal wafer check valve is divided into full-lined soft-seal wafer check valve and Semi-lined/normal soft-seal wafer dual plate check valve.

Features of Wafer dual plate Check Valve:

Simple structure and light weight, especially suitable for low-pressure large-diameter pipelines;
The paired clamp connection mode, the production process is simple, and the disassembly and assembly are convenient;
The check valve adopts the clamp type, the butterfly plate is two semicircles, and the spring is forced to reset. The sealing surface can be built-up welding wear-resistant material or rubber lining, with a wide range of use and reliable sealing.

Model: H76X/H76H/H76W
Name: Wafer dual plate check valve
Please refer to the main technical parameters and spare parts materials:
https://www.tanghaivalve.com/wafer-type-double-disc-swing-check-valve-introduction/
Product name: Wafer double plate check valve (soft seal)
National Standard Number: H76X

dual plates check valve photos-normal sealing (1)

Size range: DN40-DN1200
Pressure rating: PN10/16/25/40/64/100
Valve features: double valve plate design, short running track of the valve plate, spring load makes the valve plate close more quickly, effectively preventing water hammer
When the valve plate is opened, it is close to 90 degrees, and the pressure loss is small
Zero leakage
Size range: 2″ to 48″
Pressure range: 10bar-50 bar
Suitable flange: National standard or EN1092 PN10/PN16/PN25/PN40 or ANSI 125/150/300
Structure length: EN558 series 16, API594

Body material: gray cast iron, ductile iron, carbon steel, stainless steel, aluminum bronze
Valve plate material: ductile iron nickel-plated, stainless steel 201, stainless steel 304,

dual plates check valve photos- full rubber

stainless steel 316, aluminum bronze
Valve seat material: nitrile NBR, EPDM, oil and acid and alkali resistant fluorine rubber VITON-A, steam resistant fluorine rubber VITON-B, hard seal
Uses: Suitable for installation at the outlet of high-lift pumps, or as a bottom valve in front of the pump, suitable for water, sea water, steam, oil, chemicals, chlorine, oxygen, and steam. Can be installed horizontally or vertically.
Application scope:
It is suitable for industrial, environmental protection, sewage treatment, high-rise building water supply and drainage pipelines, etc. It can also be used for environmental systems with corrosive media such as power plants and steel plants gypsum slurry.

Product name: Wafer double plate check valve (metal seated)
National standard number: H76H(W)-16C(16P, 16R, 16RL)
Size range: DN40-DN1200

H76-wafer type dual plate check valve metal seated

Pressure rating: PN10/16/25/40/64/100
Temperature range: -20℃ -350℃
Body material: WCB, A105, CF8, CF3, CF8M.CF3M and other materials and special steel
Valve plate material: WCB, A105.2CR13, 304.304L.316.316L and other materials and special steel
Valve shaft material: A105.2CR13, 304.304L.316.316L and other materials and special steel
Valve seat material: 2CR13, 304.304L.316.316L, STL and other materials and special steel
Application range: water, steam, oil, nitric acid, acetic acid, strong oxidizing medium and urea and other media
More video for wafer dual plate check valve, please see below:
https://www.youtube.com/watch?v=pGrkznOd-JA
https://youtu.be/etwT8RX-S3Q
https://www.youtube.com/watch?v=XqRRI7o-LFI

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Gate valve has a broad market in the field of sewage treatment

October 11, 2021

The market situation is often complementary to the country’s development policies. As the country implements energy conservation and emission reduction strategies and accelerates the cultivation and development of strategic emerging industries, the construction scale and service scope of my country’s sewage treatment industry have

Socket welding gate valve-DN150-PN16-square hat (1)

gradually expanded. For gate valve products that are indispensable in the field of sewage treatment, it has entered a period of rapid development. The market demand for Tanghai gate valve products is increasing day by day, and it has a broad market space in the sewage treatment market.
Through the data feedback of Tanghai Valve Business Department, we can see that in addition to gate valves, butterfly valves, ball valves and other products are also popular valve products by customers, which play an important role in sewage treatment and are in strong demand. At present, the rate of urbanization in my country is continuously increasing, and the amount of water supplied by water plants and the scale of sewage treatment in sewage treatment plants are gradually increasing. Therefore, sewage treatment requires a large number of environmentally friendly valve equipment.
Although gate valve products are in great demand, domestic gate valve manufacturers have mixed good and bad products. Some valve manufacturers have poor product quality, low technical level, narrow export categories, varieties and regions, and are not competitive in the international market. But for veteran manufacturers like Tanghai Valve, challenges and opportunities coexist. On the one hand, competition in the valve market has become more fierce. Common gate valves, ball valves, globe valves and other product markets have begun to fight fierce price wars. This is a huge challenge for Tang Hai. On the other hand, market competition encourages the old valve manufacturers represented by Tanghai Valve to accelerate the integration of their products with international standards, enhance the competitiveness of enterprises and regions, promote the quality improvement and transformation and upgrading of gate valves and other valves, and realize the sustainable development of the valve industry.
On the road in the future, Tanghai Valve will open up more sales channels and increase effective production capacity for the application of gate valve products in the field of sewage treatment, so as to obtain more orders. Through the correct analysis of manufacturing, marketing, expansion, financial and other costs, effective cost control is achieved, and the company adheres to the sound development path that guides the enterprise toward environmental protection.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Introduction to the Features of Lever Wafer Butterfly Valve

October 9, 2021

Lever or Handle wafer butterfly valve is a kind of butterfly valve, usually with soft seal, which consists of a sealing surface made of rubber or fluoroplastic as a sealing material and a valve plate and stem made of carbon steel or

wafer-type-butterfly-valve-with-handle-13

stainless steel. Due to the limitation of the sealing surface material, the handle wafer butterfly valve is only suitable for water, gas, oil and other fluid media with a temperature of ≤80～120℃. The application fields include chemical industry, petroleum, electric power, textile, papermaking, construction water supply and drainage, etc. It is used for on-off control of normal temperature and pressure pipeline media on pipelines that transport various corrosive and non-corrosive fluid media in the engineering system, and can also be used for flow adjustment.
Handle wafer butterfly valves are generally only suitable for small-diameter valves, that is, valves with a diameter less than or equal to DN200mm. Because the small-diameter torque is relatively small, the opening and closing of the valve can be directly controlled by hand. The caliber is greater than 200mm, and according to the specific size of the caliber, it needs to be equipped with a turbine head, a pneumatic device or an electric device.
Because the handle wafer butterfly valve is a soft sealing butterfly valve, when the valve is installed and used, the valve must be opened at an angle, which is generally between 5°-10°. Do not allow the sealing surface rubber to be squeezed for a long time. state.
The main features of the handle wafer butterfly valve are:
1. The design structure is simple and unique, small in size, light in weight, and easy to operate.
2. Small-caliber operating torque is small, labor-saving and dexterous, opening and closing quickly.
3. It can be installed at any position of the pipeline, which is very convenient for installation and maintenance.
4. Handle wafer butterfly valves are usually soft-sealed, with reliable sealing performance, and can achieve two-way sealing with zero leakage.
5. The sealing surface material is easy to replace, resistant to aging, weak corrosion, and has a long service life.
Founded in 1994, Tanghai Valve is a professional valve manufacturer integrating design, development, production, sales, installation and service, and a high-quality valve manufacturer. The leading products include: wafer butterfly valves, flanged butterfly valves, hard-sealed butterfly valves, gate valves, butterfly check valves and other water series control valve products and related supporting pipeline accessories. The product sales range covers all parts of the country, and it has developed steadily in developing countries and regions such as Asia, Africa, and Latin America, and has successfully opened markets in developed countries and regions such as Europe and the United States. Products are widely used in water supply and drainage, electric power, petrochemical, metallurgical and other industries.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Medium temperature for butterfly valves of different materials

September 30, 2021

In the large number of butterfly valve enquiries made by Tanghai Valve every day, “medium temperature” is a frequently mentioned term. Because the different types of media have a great influence on the selection of valve varieties. Whether the medium is an ordinary liquid, a highly corrosive special medium, or a cement-like turbid

Double flange butterfly valve (7)

medium, all correspond to different valve types. Whether the medium is high temperature or low temperature also determines which material of the butterfly valve is more suitable and durable. Now let’s take a look at the medium temperature of various butterfly valve materials.
The main material involved here is the body and bonnet material of the butterfly valve. The corresponding medium temperature is as follows:
Cast iron-the highest temperature of the applicable medium is 300℃;
Nodular cast iron-the highest temperature of the applicable medium is 350℃;
Stainless steel ——The highest temperature of applicable medium is 600℃;
Polytetrafluoroethylene——Maximum operating temperature of applicable medium: -180~150℃;
Rubber —— The highest operating temperature of the applicable medium: natural rubber 60℃; nitrile rubber and neoprene rubber 80℃; fluorine rubber 150℃. When the valve lining is made of rubber or plastic, its temperature resistance shall prevail.
Gray cast iron-the highest temperature of the applicable medium is 250℃;
High silicon cast iron-the highest temperature of the applicable medium is 120℃;
Carbon steel-the highest temperature of the applicable medium is 425℃ (if 16Mn, 30Mn forgings can reach 450℃);
Alloy steel-the highest temperature of the applicable medium is 550℃;
Copper alloy-the highest temperature of the applicable medium is 200℃;
Titanium-the highest temperature of the applicable medium is 300℃;
In addition, there are relatively special ceramic and glass butterfly valves, which have poor temperature resistance and are generally used below 90°C. The temperature resistance of the enamel valve is limited by the material of the sealing ring, and the maximum medium temperature exceeds 150℃.
Among the above various butterfly valve materials, cast iron butterfly valves, spheroidal ink butterfly valves, stainless steel butterfly valves, PTFE butterfly valves, and rubber butterfly valves are widely used and have better overall performance. They also occupy a large number of daily orders for Tanghai valves. The proportion of products is very popular in the market. Tanghai Valve produces butterfly valve products of various specifications and materials. With 24 years of industry experience, I believe you will definitely choose your favorite high-quality butterfly valve here.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

What are the connection methods of gate valves for hydropower stations

September 29, 2021

Gate valves used in hydropower stations are often in a relatively special working environment, which also puts forward high requirements on the quality of the gate valves. Among them, the connection method it uses is also an important process composition. What we are going to share today is about the connection method of gate valves for hydropower stations.

DIN-F5-BB-NRS-soft seated-wedge gate valve (10)

The most common connection method used in gate valves of hydropower stations is mainly flange connection. This connection method is usually two flange pieces plus a number of fastening bolts and nuts, and the pipes are connected by pressing the middle flange gasket. Why do you think that flange connection is the most suitable method for gate valves in hydropower stations? This is mainly because the flange connection can withstand high-strength tensile, compression, torsion and shear resistance. The flange connection is a detachable joint, which has the advantages of convenient disassembly, high connection strength, and good tightness.
According to the shape of the joint surface, the flange connection can be divided into: smooth type, used for gate valves with low pressure; concave-convex type; tongue and groove type: widely used in corrosive media, with better sealing effect; trapezoidal groove type: Use an oval metal ring as a washer, which is used for gate valves with a working pressure of ≥64 kg/cm², or high-temperature gate valves; lens type: the washer is in the shape of a lens and is made of metal. Used for high-pressure gate valves or high-temperature gate valves with working pressure ≥100 kg/cm²; O-ring type: This is a newer form of flange connection, which is developed with the appearance of various rubber O-rings As a result, it is more reliable than ordinary flat gaskets in terms of sealing effect. In addition to flange connection, there is also threaded connection or ferrule connection, which is a simple connection method that can reliably prevent leakage and so on.
After a brief introduction, do you have your own ideas for the selection of gate valves for hydropower stations? If you need a gate valve for a hydropower station, please first consider Tanghai Valve. The gate valve produced by Tanghai Valve is mainly used in normal temperature and pressure environment, professional and high-quality, and professional technicians will give reasonable suggestions according to your working conditions, so that you can easily choose the right one. Of valve products, you are welcome to contact us at any time.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Correct installation of flanged butterfly valve can effectively prevent leakage

September 28, 2021

Butterfly valve has the advantages of good flow adjustment function and good closing and sealing characteristics, so it has become one of the fastest-growing valve varieties in the past ten years. It has simple and compact structure, light weight, convenient operation, reliable performance, complete functions, beautiful appearance, easy

Double flange butterfly valve (16)

maintenance, and is very popular with customers. In actual working conditions, if you want the flanged butterfly valve to achieve effective leakage prevention, the correct installation method is very important. Today, the editor of Tanghai Valve will share with you the installation precautions of the flange butterfly valve, as follows:
1. Before installation, you must carefully check whether the valve’s logo and certificate meet the requirements for use, such as Tanghai D342X flange rubber-sealed butterfly valve, to see whether the product brand, model, etc. are consistent with the valve required for the pipeline, and clean it after verification. Here is also the storage problem of flanged butterfly valves: the butterfly valves that have not been installed and used for the time being must be stored in a dry room; the butterfly valves that have been stored for a long time should be cleaned regularly, blown dry, and coated with anti-rust oil. The flange sealing surface should be protected by a blind plate.
2. Install according to the medium and its flow direction. For example, if you use water, you need to use ethylene-propylene rubber gaskets. When tightening the bolts, use the symmetrical or star-shaped torque method; if you use corrosive media, use PTFE gaskets. When tightening the bolts, use Torque on symmetrical or star-shaped method;
3. When installing the connecting bolts of the flange butterfly valve and the pipeline, do not tighten a single piece at one time, and should tighten it in diagonally opposite directions multiple times to prevent the uneven force from leaking at the flange connection.
4. When installing the butterfly valve, keep the butterfly plate in the closed position to prevent debris from entering the worn sealing surface. When the user is testing pressure, the pressure can be tested only after the two ends are installed with flange pairs.
5. When the valve is connected to the pipeline, flanges of appropriate specifications should be selected to ensure an effective sealing surface.
6. Before the electric flange butterfly valve is connected to the power supply for the first time, it needs to be manually adjusted to 1/3 of the closed position, and check whether the direction of the indicator plate is consistent with the opening direction of the valve.
7. When the flange butterfly valve is in use, if any malfunction is found, it should be stopped immediately.
Master the above correct installation method, flange butterfly valve will be more confidential and durable in application. If you are in need of purchasing high-quality flanged butterfly valves, Tanghai will be your best choice. The sealing surface of Tanghai flange butterfly valve has high processing precision, small opening friction and easy closing. Not only the self-sealing performance and the sealing performance are stable, but it also has the characteristics of self-locking that becomes tighter and tighter. It is suitable for gas, steam, air, water and other media. You are welcome to inquire.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

The difference between knife gate valve and ordinary gate valve

September 27, 2021

There are many types of gate valves. Knife gate valve is one of them, also called knife gate valve. According to different structure types, gate valves can be divided into flat gate valves and knife gate valves. According to the different connection methods, knife gate valves can be divided into flange type; lug type and wafer type.

DIN-F5-BB-NRS-soft seated-wedge gate valve (10)

Compared with ordinary gate valves, the structure of the knife gate valve is simple, the opening and closing part is a gate, and the movement direction of the gate is perpendicular to the direction of the fluid. It is small in size, flexible in operation, and easy to install. It is more suitable for media with higher consistency and solid particles. As we can see from the name, the knife gate valve mainly relies on the knife-edge gate to cut off the medium. The gate has two sealing surfaces, forming a wedge shape. The gate can be made into an integral rigid gate; it can also be made into an elastic gate that can produce slight deformation and improve the sealing performance from the process. To sum up, compared with ordinary gate valves, knife gate valves mainly highlight the following product advantages:

1. The U-shaped gasket has a good sealing effect.
2. The full-diameter design makes the medium passability strong. At the same time, it can be easily installed, easily disassembled, and maintained under the working conditions of dirty media. The valve seal can be replaced without removing the valve, making the valve maintenance easier.
3. The gate with the function of the guillotine knife has good sluicing effect, can effectively squeeze off all kinds of debris in the medium, and solve the leakage phenomenon of the medium containing lumps, particles and fibers after the sluice is broken.
4. The knife gate valve has an ultra-short structure length, small size, small flow resistance, light weight, material saving, and small effective space.
Although the price of knife gate valve is about 20% higher than that of ordinary gate valve, its better performance has been generally recognized by the market, and it has quietly boarded the list of the most popular product series of Tanghai Valve. Through more than 20 years of research and production of valve technology, Tanghai Valve has senior production experience and advanced technical level, has a formal and modern production base, and has stably provided a large number of products for the knife gate valve market with a good reputation. If you need a knife gate valve, choose Tanghai Valve.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Advantages of Triple Eccentric Metal seated Butterfly Valve

September 26, 2021

The triple eccentric butterfly valve belongs to the metal seated butterfly valve. The triple eccentricity is named because its stem axis deviates from the center of the disc and the center of the body at the same time, and there is a certain angle between the axis of rotation of the valve seat and the axis of the valve body channel. The triple-eccentric butterfly valve is corrosion-resistant, wear-resistant, and has a long service life. It is suitable for working conditions

D673H-16C-stainless steel pneumatic triple eccentric butterfly valve

where the medium temperature is ≤425℃. It is widely used in metallurgy, electric power, petrochemical, and water supply and drainage, municipal construction and other industrial pipelines for adjustment. Flow rate and use of off-load fluid. The body materials of the triple eccentric butterfly valve are cast iron, cast steel and stainless steel. This article will make an analysis and introduction to the advantages of the triple eccentric butterfly valve.

1. The metal-to-metal elastic hard seal structure is a structure in which an elastic metal J-ring is installed on the valve seat. The J-ring is pressed by a pressure plate and fixed with bolts. The two sides of the J-ring are respectively provided with sealing rings with good sealing performance, high temperature and high pressure resistance, and a certain margin. The position of the J-ring can be adjusted to make the valve After a period of use, it will not leak due to wear. The valve is suitable for medium and high temperature and medium and high pressure pipeline systems.

2. High wear-resistant self-lubricating composite bearings are used in the key parts of the relative movement of the shaft and the body to reduce the friction of the butterfly plate when it is opened or closed, and to ensure that there is no wear between the shaft and the body.

3. At the bottom of the lower shaft of the valve body, a high-hardness wear-resistant alloy spherical thrust pad and a high-hardness flat pad are used. During the movement of the butterfly plate, all downward gravity and friction forces are concentrated here. Due to the high hardness of the two thrust pads, the small contact area, long-term movement without abrasion, to ensure that the valve opens and closes easily, and never sinks.

D943H-16C-metal seated stainless steel electric triple offset butterfly valve

4. The triple eccentric structure is a qualitative leap of the butterfly valve. Therefore, the valve greatly improves the service life and significantly improves the opening and closing torque. If you don’t understand the triple eccentric structure, you can click (https://www.tanghaivalve.com/triple-eccentric-butterfly-valve-th-btv-te/) to view.

5. The metal-to-metal multi-layer composite hard seal structure is a structure in which a multi-layer composite metal ring is installed on the valve plate. The multi-layer composite metal ring is made of stainless steel metal plates and flexible graphite sheets repeatedly laminated and pressed, which has high strength and rigidity. Flexible graphite still has good sealing performance under high temperature and high pressure. The combination of rigidity and flexibility of these two materials makes the valve suitable for most media, with a wide range of applications and long service life.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Introduction to the applicable occasions of butterfly valve

September 24, 2021

Butterfly valve is one of the most commonly used valves in piping systems. It has a wide range of applications. It can not only be used to cut off the flowing medium in the pipeline, but also can be used for flow adjustment. When the

Fluorine lined butterfly valve-PTFE-WAFER (10)

fluid in the pipeline passes through the butterfly valve, the pressure loss is about 3 times that of the gate valve, and the pressure loss is relatively large. Therefore, two factors should be considered when choosing a butterfly valve. One is the pressure loss experienced by the piping system, and the other is the pressure of the pipeline medium and the working temperature that the elastic valve seat material can withstand when the butterfly valve is closed.
The structural length of the butterfly valve is short, the overall height is also small, the operating torque is short, it can be opened and closed quickly, and fluid control can be performed well. The structural principle of the butterfly valve makes it most suitable for making large-diameter valves. When the butterfly valve is required to be used for flow control, in order to make it work more effectively, it is necessary to select the correct size and type of the butterfly valve.

What occasions are butterfly valves suitable for?

Double eccentric-wafer butterfly valve-D372F-150lbP-stainless steel (1)

1. It is required to be used for throttling and regulating control in the pipeline, and the valve structure is required to be short in length and fast in opening and closing. It is recommended to use a butterfly valve.
2. On pipelines that require two-position adjustment and necking, low noise is required, cavitation is generated, a small amount of leakage into the atmosphere, and the circulating medium is corrosive, a butterfly valve can be selected.
3. Under special working conditions where there are strict requirements for sealing, low temperature containing impurities, and easy to cause wear, it is recommended to use butterfly valves, and to use metal-sealed triple-eccentric or double-eccentric butterfly valves.
4. In petroleum, petrochemical, chemical, metallurgical, electric power and other fields, it is recommended to use metal hard-seal triple-eccentric butterfly valves. In many cases, they can replace gate valves and globe valves.
5. The center line butterfly valve is suitable for the environment with strict requirements on sealing performance and zero leakage. The center line butterfly valve is most suitable for fresh water, sewage, sea water, salt water, steam, natural gas, oil and oil at a working temperature of -10-150℃. Used in pipelines of various acid and alkali media.

triple offset butterfly valve-double flange- (5)

6. The double eccentric butterfly valve is very suitable for use in urban heating, gas, water and gas pipelines, as a device for intercepting or adjusting flow.
7. Eccentric soft sealing butterfly valves are widely used in gas pipelines and waterways in metallurgy, light industry, electric power and petrochemical systems. Used as a two-way opening, closing and adjustment of the ventilation and dust removal pipeline.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Introduction to the applicable occasions of butterfly valve

September 23, 2021

Butterfly valve is one of the most commonly used valves in piping systems. It has a wide range of applications. It can not only be used to cut off the flowing medium in the pipeline, but also can be used for flow adjustment. When the fluid in the pipeline passes through the butterfly valve, the pressure loss is about 3 times that of the gate valve, and the pressure loss is relatively large. Therefore, two factors should be considered when choosing a butterfly valve. One is the pressure loss experienced by the piping system, and the other is the pressure of the pipeline medium and the working temperature that the elastic valve seat material can withstand when the butterfly valve is closed.

U-type flange butterfly valve, ductile iron, DI, center line,

The structural length of the butterfly valve is short, the overall height is also small, the operating torque is short, it can be opened and closed quickly, and fluid control can be performed well. The structural principle of the butterfly valve makes it most suitable for making large-diameter valves. When the butterfly valve is required to be used for flow control, in order to make it work more effectively, it is necessary to select the correct size and type of the butterfly valve.

What occasions are butterfly valves suitable for?
1. It is required to be used for throttling and regulating control in the pipeline, and the valve structure is required to be short in length and fast in opening and closing. It is recommended to use a butterfly valve.
2. On pipelines that require two-position adjustment and necking, low noise is required, cavitation is generated, a small amount of leakage into the atmosphere, and the circulating medium is corrosive, a butterfly valve can be selected.
3. Under special working conditions where there are strict requirements for sealing, low temperature containing impurities, and easy to cause wear, it is recommended to use butterfly valves, and to use metal-sealed triple-eccentric or double-eccentric butterfly valves.
4. In the fields of petroleum, petrochemical, chemical, metallurgy, electric power, etc., it is recommended to use metal hard seal triple eccentric butterfly valve. In many cases, it can replace gate valve and stop valve.
5. The center line butterfly valve is suitable for the environment with strict requirements on sealing performance and zero leakage. The center line butterfly valve is most suitable for fresh water, sewage, sea water, salt water, steam, natural gas, oil and oil at a working temperature of -10-150℃. Used in pipelines of various acid and alkali media.
6. The double eccentric butterfly valve is very suitable for use in urban heating, gas, water and gas pipelines, as a device for intercepting or adjusting flow.
7. Eccentric soft sealing butterfly valves are widely used in gas pipelines and waterways in metallurgy, light industry, electric power and petrochemical systems. Used as a two-way opening, closing and adjustment of the ventilation and dust removal pipeline.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

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